Register Now

In order to be able to post messages on the SailNet Community forums, you must first register. Please enter your desired user name, your email address and other required details in the form below.Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.

User Name:

Password

Please enter a password for your user account. Note that passwords are case-sensitive.

Password:

Confirm Password:

Email Address

Please enter a valid email address for yourself.

Email Address:

OR

Log-in

User Name

Password

Remember Me?

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Additional Options

Miscellaneous Options

Automatically parse links in text

Automatically embed media (requires automatic parsing of links in text to be on).

Automatically retrieve titles from external links

Click here to view the posting rules you are bound to when clicking the'Submit Reply' button below

ltgoshen
Re: Yanmar not starting
Quote:
Originally Posted by doug1957 View Post
Thanks all. The exhaust riser blew out before the mixing elbow, so that explains part of the problem. Should have made sure (asked) the PO if he cleaned the elbow regularly. Water in the combustion chambers has come to mind.
Yo Doug Vinigar twice a year thru the engine will help beat down the build up.
1)Start the engine,
2) Put a gal on Vinigar in somthing you can fit your suction hose into.
3) take your suction side hose off the water strainer and let it draw the vinigar thru your engine.
4) when all the vinigar has been pulled thru the engine, hook your hose back to the raw-water strainer.
It should help some. You will still need to do a good exhaust riser cleaning once a year. Good luck. I have a 2GM 13 yanmar and Its a great little engine. A little maintenance and they will last a lifetime.

Are you saying that sucking the vinegar through the engine in a single pass is enough residence time to clean the exhaust riser or do you need to start the motor, suck the vinegar in, shut the motor down, wait 10 minutes or so for the vinegar to break up the scale, and then blow the vinegar out on the restart? I have also heard that you can use oxalic acid diluted about 1:1.

Thanks all. The exhaust riser blew out before the mixing elbow, so that explains part of the problem. Should have made sure (asked) the PO if he cleaned the elbow regularly. Water in the combustion chambers has come to mind.

Yo Doug Vinigar twice a year thru the engine will help beat down the build up.
1)Start the engine,
2) Put a gal on Vinigar in somthing you can fit your suction hose into.
3) take your suction side hose off the water strainer and let it draw the vinigar thru your engine.
4) when all the vinigar has been pulled thru the engine, hook your hose back to the raw-water strainer.
It should help some. You will still need to do a good exhaust riser cleaning once a year. Good luck. I have a 2GM 13 yanmar and Its a great little engine. A little maintenance and they will last a lifetime.

10-08-2012 08:09 AM

aa3jy

Re: Yanmar not starting

One thing I've noticed over the years in colder climates and passing cold fronts..diesel fuel thickens or condensation builds with drop in temps..try changing your filters more often and change to a slightly larger micron size and bleed your fuel system..

10-08-2012 07:38 AM

doug1957

Re: Yanmar not starting

Thanks all. The exhaust riser blew out before the mixing elbow, so that explains part of the problem. Should have made sure (asked) the PO if he cleaned the elbow regularly. Water in the combustion chambers has come to mind.

10-07-2012 12:16 PM

lostatsi

Re: Yanmar not starting

There is no harm in shutting off the salt water (cooling supply) sea **** and working strictly on the starting issue first ( no need to run long once fixed). Very basic on a deisel, fuel at injector pump. Then address the (no gurgling) sea water issues. Bear in mind that an impeller can look fine and even appear to spin with pump cover off yet still not work when the pressure from the cover is applied or rpms increase. I have had hands on experience with the impeller hub spinning inside the rubber. If you feel you have water in the combustion chambers turn the motor over back-wards by hand a couple of revolutions to prevent hydraulic damage. Check for water in oil also.

10-06-2012 05:14 PM

Gene T

Re: Yanmar not starting

Well, sprayed blackish water = blown exhaust hose due to blockage or hole after the riser. Blockage could be in anti-siphon riser. That doesn't explain why it won't start now however. Find the leak and it will probably lead you to the problem.

Gene

10-06-2012 04:57 PM

doug1957

Yanmar not starting

Hi all. Just want check my assumptions. The engine (2YM15) initially started, and I didn't hear the cheerful gurgle from the stern and a quick check confirmed there was no water coming out. Turned the engine off immediately, and no alarms sounded. Strainer was fine, impeller checked out, so it's not that. In the engine compartment, dirty water (black) had sprayed around - not oily to the touch. Also, on a second try the engine turned over, but would not start. Also, diesel(?) vapor appeared to be coming out of the air filter.

What I think happened is the mixing elbow clogged completely and probably blew out. There is still sufficient back pressure to keep the engine from starting. I'll be checking on this tomorrow but is this a reasonable hypothesis, and most importantly, is there any possible major damage to look for? Thanks.